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core: implement interpolate() function for unit types

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Calls the global interpolate() function for integer types.

For now, the template is enabled if the arguments are not
integer types. Might want to refine that in the future.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
This commit is contained in:
Berthold Stoeger 2024-12-14 09:49:31 +01:00
parent 133bc50d53
commit 64945a1c96
4 changed files with 22 additions and 4 deletions
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17
core/units.h
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@ -2,6 +2,8 @@
#ifndef UNITS_H
#define UNITS_H
#include "interpolate.h"
#include <math.h>
#ifndef M_PI
#define M_PI 3.14159265358979323846
@ -86,6 +88,12 @@
* _permille -> fraction_t in ‰
* _percent -> fraction_t in %
*
* For now, addition and subtraction of values of the same type
* are supported.
*
* A free standing interpolate() function can be used to interpolate
* between types of the same kind (see also the interpolate.h header).
*
* We don't actually use these all yet, so maybe they'll change, but
* I made a number of types as guidelines.
*/
@ -140,6 +148,15 @@ struct unit_base {
}
};
template <typename T,
std::enable_if_t<!std::is_integral<T>::value, bool> = true>
T interpolate(T a, T b, int part, int whole)
{
return T::from_base(
interpolate(a.get_base(), b.get_base(), part, whole)
);
}
struct duration_t : public unit_base<duration_t>
{
int32_t seconds = 0; // durations up to 34 yrs